import { getToken, setToken, removeToken, setUserInfo } from '@/utils/auth';
import router, { resetRouter } from '@/router';
import { loginByUsername, getLeftMenus } from "@/views/login/login.service";
import store from "@/store";

const state = {
  token: getToken(),
  name: '',
  avatar: '',
  headSearch: '',
  introduction: '',
  roles: [],
  codes: [],
  externalLink: ''
};

const mutations = {
  SET_TOKEN: (state, token) => {
    state.token = token
  },
  SET_INTRODUCTION: (state, introduction) => {
    state.introduction = introduction
  },
  SET_NAME: (state, name) => {
    state.name = name
  },
  SET_AVATAR: (state, avatar) => {
    state.avatar = avatar
  },
  SET_ROLES: (state, roles) => {
    state.roles = roles
  },
  SET_CODES: (state, codes) => {
    state.codes = codes
  },
  SET_EXTERNAL_LINK: (state, link) => {
    state.externalLink = link
  },
  SET_HEAD_SEARCH: (state, queryString) => {
    state.headSearch = queryString;
    setTimeout(() => {
      state.headSearch = '';
    }, 200);
  }
}

const actions = {
  // user login
  login({ commit }, userInfo) {
    return new Promise((resolve, reject) => {
      loginByUsername(userInfo.username.trim(), userInfo.password).then(response => {
        commit('SET_TOKEN', response.data.objectId);
        commit('SET_NAME', response.data.trueName);
        setToken(response.data.objectId);
        setUserInfo(response.data);
        resolve();
      }).catch(error => {
        reject(error)
      })
    })
  },

  // 获取左侧菜单列表
  getLeftMenus({ commit, state }) {
    return new Promise((resolve, reject) => {
      getLeftMenus().then(response => {
        // 添加一个role flag 来判断左侧菜单已经拉取完毕，避免每次都会去请求后台
        commit('SET_ROLES', ['admin']);
        store.commit('permission/SET_ROUTES', response.data);
        resolve();
      }).catch(error => {
        // 告诉组件加载失败，停止loading
        reject(error);
      });
    });
  },

  // get user info
  getInfo({ commit, state }) {
    return new Promise((resolve, reject) => {
      const data = {
        roles: ['admin'],
        introduction: 'I am a super administrator',
        avatar: 'https://wpimg.wallstcn.com/f778738c-e4f8-4870-b634-56703b4acafe.gif',
        name: 'Super Admin'
      };
      if (!data) {
        reject('Verification failed, please Login again.')
      }

      const { roles, name, avatar, introduction } = data

      // roles must be a non-empty array
      if (!roles || roles.length <= 0) {
        reject('getInfo: roles must be a non-null array!')
      }

      commit('SET_ROLES', roles)
      commit('SET_NAME', name)
      commit('SET_AVATAR', avatar)
      commit('SET_INTRODUCTION', introduction)
      resolve(data)
    })
  },

  // user logout
  logout({ commit, state, dispatch }) {
    return new Promise((resolve, reject) => {
      commit('SET_TOKEN', '');
      commit('SET_ROLES', []);
      removeToken();
      // resetRouter();
      // reset visited views and cached views
      // to fixed https://github.com/PanJiaChen/vue-element-admin/issues/2485
      dispatch('tagsView/delAllViews', null, { root: true })
      resolve();
    })
  },

  // remove token
  resetToken({ commit }) {
    return new Promise(resolve => {
      commit('SET_TOKEN', '')
      commit('SET_ROLES', [])
      removeToken()
      resolve()
    })
  },

  // dynamically modify permissions
  async changeRoles({ commit, dispatch }, role) {
    const token = role + '-token'

    commit('SET_TOKEN', token)
    setToken(token)

    const { roles } = await dispatch('getInfo')

    resetRouter()

    // generate accessible routes map based on roles
    const accessRoutes = await dispatch('permission/generateRoutes', roles, { root: true })
    // dynamically add accessible routes
    router.addRoutes(accessRoutes)

    // reset visited views and cached views
    dispatch('tagsView/delAllViews', null, { root: true })
  }
}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}
